<em>The key difference between a central idea and a motif is </em><em>b) A central idea is abstract, while a motif is concrete. </em>
A <u>central idea</u> of a literary work -the theme- is the dominant idea the author wants to conveys. <u>Motifs</u>, on the other hand, are all the devices the author uses to support that main idea, such as images, symbols or words. <u>Motifs</u> have a symbolic value and remind the reader about the theme.
The correct answer would be C) or the third option.
it's like how people hate the lgbtq+ for being different. granted it's in a different variation.
hope this helps
ps. have a nice day